Question

我使用Python3在Visual Code Studio中进行编程。

所以我的第一个函数生成一个DNA String，我的第二个函数应该用两个不同的函数替换该字符串中的一对。我在这做错了什么。（我得到的错误以错误的语法开头。）

再次感谢您的帮助。

import random as rd


def generateVirus(length):
    a = [rd.choice(["AT", "GC","TA", "CG"])for i in range(length)]
    return ("".join(a))


def mutate(virus):
    virus = [v.replace(virus[int(rd.random()*(len(virus+1))), rd.choice([virus]for v in virus]
    return virus

a = generateVirus(4)
b = virus(a)

Answer 1

这看起来很平衡：

<a href="yourlink">your Hyper-text</a>

但是你永远不会定义你调用的def mutate(virus): virus = [v.replace(virus[int(rd.random()*(len(virus+1)))]), rd.choice([virus]for v in virus)] return virus函数：

virus

Answer 2

import random as rd

dna = ["AT", "GC","TA", "CG"]
def generateVirus(length):
    a = [rd.choice(dna)for i in range(length)]
    return ("".join(a))

def mutate(virus):
    start = int(rd.random()*(len(virus)/2)) *2
    replacement = rd.choice(["AT", "GC","TA", "CG"])
    newvirus = virus[0:start] + replacement + virus[start+2:]
    return newvirus



a = generateVirus(4)
b = mutate(a)
print(a) 
print (b)

现在可以使用

Python我不能替换我的字符串值

2 个答案: